Search a number
-
+
2110021 is a prime number
BaseRepresentation
bin1000000011001001000101
310222012101221
420003021011
51020010041
6113120341
723635444
oct10031105
93865357
102110021
111211321
128590b1
1358b544
143ccd5b
152ba2d1
hex203245

2110021 has 2 divisors, whose sum is σ = 2110022. Its totient is φ = 2110020.

The previous prime is 2110019. The next prime is 2110027. The reversal of 2110021 is 1200112.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1600225 + 509796 = 1265^2 + 714^2 .

It is a cyclic number.

It is not a de Polignac number, because 2110021 - 21 = 2110019 is a prime.

Together with 2110019, it forms a pair of twin primes.

2110021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2109986 and 2110013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2110027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1055010 + 1055011.

It is an arithmetic number, because the mean of its divisors is an integer number (1055011).

22110021 is an apocalyptic number.

It is an amenable number.

2110021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2110021 is an equidigital number, since it uses as much as digits as its factorization.

2110021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4, while the sum is 7.

The square root of 2110021 is about 1452.5911331135. The cubic root of 2110021 is about 128.2612867470.

Adding to 2110021 its reverse (1200112), we get a palindrome (3310133).

Subtracting from 2110021 its reverse (1200112), we obtain a palindrome (909909).

The spelling of 2110021 in words is "two million, one hundred ten thousand, twenty-one".